Duplicating-machine



N. '8. Hum). DUPLICATINQ MACHINE. APPLICATION FILED JUNE 71 I920.-

Patented Sept .27, 1921.;

2 SHEETS-SHEET I N, B. HURD. DUPLICAIING MACHINE.

APPLICATION FILED JUNE 1. I920.

A IVV Z SHEETS-SHEET 2.

ZEWH II PatentedSpt'. 27, 1921.

, citizen of the United States of America, re-

UNITED STATES PATENT OFFICE.

NORMAN B. HURD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO AMERICAN HARDWARE CORPORATION, OF NEW IBRITAIN, CONNECTICUT, A CORPORATION OF.

CONNECTICUT.

DUPLICATING-MACHINE. V

' Specification of Letters Iatent. Patented Sept, 27, 1921.

Application filed. June 7, 1920. Serial No; 386,935.

To all whom it may concern:

Be 1t known that I, NORMAN B. Horn, :1

siding at New Britain, Connecticut, have invented a new and useful Duplicating-Matcfhine, of which the following is a specifica- My invention relates to certain new and useful improvements in duplicating machines of a type which is of particular utility in the duplication of key-bittings. It is my aim to produce a device of this type which is exceedingly compact, simple in form, easily operated and which will perform the duplicating function with the greatest accuracy. In the accompanying drawings I have shown my invention in one preferred form in which- Figure 1 is aside elevation of the complete machine. 1 Fig. 2 is a plan viewthereof.

Fig. 3 is a section of a detail which I will term a holder.

Figs. 4, 5 and-6 are detail views of certain parts, of said holder detached.

Fig. 7 is a fragmentary view of a modified cutter.

Fig. 8 is a erspective view of portion of a modified positioning device.

Fig. 9 is a view of a key blank for a cylinder lock.

Fig. 10 is a view of a key blank for an ordinary tumbler lock. I I

Fig. 11 is a view of a detached detail which I-will term a gage. 1- represents a frameusually made of a solid casting and having a suitable base with upright supports for the various parts. 2 is a shaft mounted in bearings 33 on the base. 4 is a cutter in the form of a rotary wheel which is designed to be mounted on.

the head 2 of the shaft 2. The edge of the I cutter 4 is shaped appropriately to cut the bittings in the edge of a so-called flat key, such as used with pin cylinder locks. '6 1s a fly-wheel which may have a handle 7 for I .manual operation and which may have pcholder being-,located in a plane somewhat in advance of the other, the advanced holder being in front of the cutter 4 while the other holder is in front of a positioning device 10. This positioning device 10 has a nose at the front side facing the last-mentioned holder, and this positioning nose stands in a plane somewhat outside of the edge of the cutter 4. By outside I mean farther away from the axis of the shaft 2 than the edge of said cutter. The degree of offset of the positioning device relatively to the edge of the cutter should correspond to the degree to which the outside holder is offset from the holder which faces the cutter. The positioning device is provided with a laterally extending rod 11 which fits into a bearing 12 on the main body of the frame. 13 is a set screw which constitutes one simple means for securing the rod ll in the bearing 12 when ,the proper adjustment of the nose of the positioning device hasbeen established. 14 is an adjusting screw at thetail end of the positioning device 10, the lower end of the screw 14 bearing on the frame 1 in such a manner that by turning the screw 14 up or down the positioning device will be tilted device and bears against the end of the hearing 12. By means of the screws 14-15 the exact position of the nose of the positioning device is established and then the screw 13 is turned down hard.

The holder on the carriage which is in front of the -cutter 4 is ada ted to hold a key blank, while the other holder located in front of the positioning device 10 is adapted to hold a key which it is desired to duplicate and which performs the function of a model in the operation of the device. 16 represents a key blank of the fiat key type mounted in the first mentioned holder, while 17- represents the finished fiat key which it is desired to duplicate, this key being carried by the second mentioned holder. Any suitable jaw mechanism may be provided for each of the holders, but in the preferred construction disclosed herein and devised by me, I have so constructed this mechanism that it will take either a fiat key such as would be made from a fiat blank such as shown in Fig. 9, or an ordinary key such as would be made from the blank 18 shown in Fig. 10. I have shown one of these holders in the detail views, Figs. 3 to 5, in which 19 represents the base of the holder having two ears 1'9 19 at the rear side for carrying a pivot 20 upon which is mounted a hinged presser piece 21. 22 is a seat which is also hinged on the pivot 20 and is arranged between the presser iece 21 and the base 19. 23 is a screw-w ich is'carried by the base 19 and projects freely up through holes in the seat 22 and the presser piece 21. 24 is a wing nut mounted on the screw 23. 25 is a spring arranged between the seat 22 and the base 19, which spring ma be of any suitable design and simply unctions to normally tilt theseat 22 up into the position shown in Fig. 3 when the wing nut 24 is re tracted. -When the seat 22 is in the position shown in Fig. 3, its front edge acts as a back stop or rear seat for the back edge of the flat key blank 16, so that wh n the resser piece 21 is forced down it wi l tight y clamp'the rear edge of the blank 16 and hold the front edge exposed to the cutting action of the cutter 4.- correspondingly, when the key 17 which is to be duplicated is laced in the I other holder, it in turn will be 61d with its exposed bitted edge facing up with the nose on the positioning device 10. Pivotally mounted in front of the holder for the key blank is a gauge 26, while pivotally mounted in front of the-holder for the key 17 is a corresponding gage 27.

In settin up the machine for operation, the holder 1n front of the positionin device 10 is open and the key 17 is ut in p ace underneath the presser 21. The gage 27 is then swung up so that the nose on the end of the same w1ll rest on the front edge of the key. The key is then'pushed endwise until the stop shoulder, where the handle or bow meets the shank of the key, engages with the nose on the gage 27 The back edge of the key is then firmly pressed against the\ back stop formed by the seat 22 and then the wing nut 24 is turned down so that the presser will tightly grip the key. The next step is to introduce the blank 16 into the other holder this being done in precisely the same way that the ke was fitted into the other holder. When t e cutter engages'the edge of the blank it will cut into the edge of the same so as to reproduce therein precisely the same bitting that is on the edge of the key 17 because it is obvious that as the carriage is moved forward and swung from side to side, the said carriage will be positioned, by the positioning device .10 in'such a way that the cutter must necessarily duplicate in the key blank the bitting existing in7 the edge of the key or model 17. 28 is a handle for moving the carriage. This handle is pivotally secured intermediate its length to the underside of the carriage and at its forward or inner end it is pivotally connected to the uide rod 8 so that the free end of the hand e may be rocked hp and down and swung from side to side to impart a corresponding movement to the carriage.v

When the machine is setup with the key and key blank in place in their respective holders, the operator grasps the free end of the handle 28 and swings the carriage upward and forward so as to bring the edge of the key blank into contact with the cutter 4, which is then being revolved by the'shaft and left the irregular edge of the key or model17 travels along the nose of the positioning device and at the same time the cute ter 4 will cut into the edge of the blank so as to fashion .the same to correspond precisely with the bitted edge of said key or model 17 If is disilrled to cutdbittifigs into 315 ordinary e o t ety ea a te to'anor inary tumbler lock, a ke y blank lected and placed inthe holder in front of the cutter. A similar type of key' which it .is desired to duplicate is laced in the other holder, and in this case the stem of the key and key blank will be seated in two complementary grooves near the forward edges of the presser piece 21 and the seat 22, said grooves bein indicatedat 21 and 22 respectively, Figs. 4 and 5. In the shaping of the bitting for such a key, an appropriate cutter, such as the cutter 4, (Fig. 7), hav- 18, Fig. 10, is sing square sided teeth should be substituted for the cutter 4, and of course a positioning piece such as 10 should be substituted for the positioning device 10, the nose on the former being square instead of beveled.

This substitution of the cutter 4 and the for the easy adjustment or substitution of positioning devices. It will also be noted it functions 0111? w pleted the full depth of the cut in the blank,

and hence, there is no additional resistance to overcome as in the case of such machines :that by makingthe ositioning device rigid, i

enthe cutter has comequipped with yielding positioning devices. Again, by prov1ding a rigid positioning device, as distinguished from a movable or yielding positioning device, there is no tendency to wear and to thereby destroy the accuracy of said device.

While I have shown my duplicating machine in its preferred form, it should be understood that I may make a wide variety of changes and modifications in the various parts without departing from the spirit and scope of the invention. c

It will be noted that the machine is exceedingly compact in form by reason of the factthat the holders are offset, instead of being arranged in lateral alinement. This has the effect ofcutting down the proper tions of the machine and has been found to reduce manufacturing costs, in addition to the other advantages herein enumerated.

What I claim is: v

1. In a duplicating machine, a rotary cutter, a positioning device arranged at one side of, and outside of said cutter, a carriage, holding means thereon for a blank and a model, said carriage being movable to and fro and laterally said holding means being constructed to hold said blank and model in proper position relatively to said cutter and positioning device.

2. In a duplicating machine, a rotary cutter, a positioning device arranged at one side of, and outside of said cutter, a car- 'riage, holding means thereon for a blank and a model, said carriage being movable to and fro and laterally said holding means being constructed to hold said blank and model in proper position relatively to said cutter and positioning device, said positioning device being rigid whereby said blank will engage the cutter before themodel engages the positioning device.

3. In a duplicating machine, a rotary cutter, a positioning device arranged at one side of, and outside of said cutter, a carriage, holding means thereon for a blank and a model, said carriage being movable to and fro and laterally said holding means being constructed to holdsaid blank'and model in proper positionrelatively to said cutter and adjusting duplicating machine, a rotary cutter, a positioning device arranged at one side of, and outside of said cutter, and a carriage I for a blank and a model, said carriage being movable to and fro and laterally, with two separate holders on said carriage, said holders being positioned relatively to each other in a manner corresponding to the positioning of the cutter and the positioning device.

ing gages coiiperating therewith to position a blank and a model in said holders respec tively, sald gages'being movable into an out of the way position after said model and blank have been secured bythe holders.

7.111 a duplicating machine, a main frame, a cutter carrying shaft carried thereby, a guide parallel with said shaft, a carriage mounted on said guide to rock toward and from said shaft and to move laterally, a positioning device carried by the frame and arranged at one side of and outside of the cutter carrying end of the shaft, two holders mounted on the carriage and positioned side by side but one in advance of the other, key positioning gages mounted on the carriage adjacent to said holders, said gages being movable into an out of the way position, said holders including means for clamping between them respectively a model and a blank to be patterned after the model.

8. In a key duplicating machine, a cutter, a carriage movable toward and away from "said cutter and laterally relatively thereto,

a holder on said carriage, said holder comprlsmg a base, a presser plece cooperating therewith, and a movable seat or key POSl and when in another position being arranged to support another kind of a key. r 9. In a key hitting machine, a cutter, a key holder arranged to be moved toward said cutter and laterally thereto and including, a

base, a presser piece and. an intermediate seat, said holder, when said seat is in one position, being arranged to hold one type of a key, and when in another position being arranged to hold another type of a key.

10. In a key duplicating machine, a rotary cutter, a positionlng device arranged at one side thereof and outside of the same, means for holding akey to be duplicated and a key 1 blank inpropenaposition relatively to said positioning device and cutter, said means be,-,

mg adapted to receive and hold, keys and blanks of different styles, said cutter and device and means on said carriage for holding a blank in a plane in advance of said model and in front of said cutter to be shaped thereby in accordance with the model, the said holders bein respectively located at the same distance rom said cutter and positioning device in all of the different positions 9f the carriage.

12. In a duplicating machine for keys and .the like, a cutter, a carriage movable to and fro and laterally relatively thereto, a holder on said carriage comprising a base, a presser piece and a piece intermediate said base and said presser piece, said interme: diate piece operating as a back stop for one type of key and as a seat for another type of key. c

13. In a duplicating machine for keys and the like, a cutter, a carriage movable to and fro and laterally relatively thereto, a holder on said carriage comprising a base, a presser piece'and a piece intermediate said base and said presser piece, said intermediate piece operating as a back stop for one'type ofkey and as a seat for another type of key, with a spring coacting with said seat to normally hold it 1n position for acting as a back stop.

said presser piece, said intermediate,

14. In a duplicating machine for keys and the like, a cutter, a carriage movable to and fro and laterally relatively thereto, a holder on said carriage comprising a base, a presser piece and a piece intermediate said base and woe operating'as a back sto for one typeio key and as a seat for anot er type of key, said presser plate having a recess in its underside located over said intermediate piece,

said intermediate piece having a coacting recess facing the recess in the presser piece, the walls of said recesses beingshaped to receive the shankof a key.

15,. In a duplicating machine a cutter," a

rigidly mounted positioning devicespaced apart from the cutter laterally and in a plane outside of the same, a blank holder and a model holder similarly spaced with" respect to said device and cutter, and movable to brin the blank into contact with the'cutter be ore the model engages the positioning device. i

16. In a duplicating machine, a cutter, a positionin device, the latter being arranged at onesi e of the former and m a plane 1 outside of the former, a blank holder and a model holder similarly arranged with respect to each other, with means for holding saidholders in a normally fixed relation,

to be simultaneously moved toward the cut ter and ositionin device and laterally-relatively tiiereto, a] of said parts being arranged to permit said cutter to engage and cut the blank in advance of engagement of the model with said positioning device.

NORMAN B. HUaD.

said means operating to permit said holders I 

